Q./A. Class 8 of Computer For Only TGES

Class:-8

Lesson:- 8 Iterative Statements in Python.

Page No.-:    132  Exercise 

A.        

1.    a) 

2.     a)                

3.     b)             

4.    c)                 

5.     c) 

B. Fill in the blanks 

1.    Repetition  is another name of iteration .

2.    for and while are the two types of looping statements in python.

3.    A for loop is used for iterating over a sequence bracket. 

4.    List is sequence , denoted by a square bracket. 

5.    Infinite loops will only stop when there is a user-defined break applied to it.

C.    Write True or False 

1.    False                 2. True                 3. True                 4. False             5. False 

Hard Words :- (Find hard words this is your homework.) Leave one page for hard words.

This chapter has not any short answer start with book's question. 

( Do in fair notebook with clean writing )

Question and Answer 

Q.1     Differentiate between a list and a tuple.

Ans:-    List :- List is a ordered but interchangeable( we can change) items. We makes list in a square bracket . Like :- a=[ "Rahul", "Avni", Tanvi", "Navya" ].

Tuple :-     It is a list of ordered items which cannot be interchanged( we can't change) . Tuple is denotes by a round bracket. Like:- ("Ramesh", "Dinesh", "Geeta", "Reeta") 

Q.2        Different between 'for loop' and 'while loop'. 

Ans:-    for loop:-  a for loop is used to iterating over a sequence . A sequence could be a list , a tuple, a set or string. 

while loop:-     The while loop repeatedly executes a set of commands for as long as the condition given along with it is true. 

Q.3        What are infinite loops?

Ans:-      An Infinite loops is a loop that continues forever and never ends. The only way to come out of such loops is to apply a condition -specific break.

Q.4        What is the use of range ( )  function in for loop ?     

Ans:-     The range ( ) function returns a sequence of numbers , stating from 0 ( by default) , and increment by 1 (by default) , and ends at a specified number. 

Example:-    for i in range (8) : 

                           print(i)

Output:-    

1

2

3

4

5

6

7

Q.5        What is the use  of else in for loop ?

Ans:-     The else keyword in a for loop specifies a block of code to be executed when the loop is finished. 

Syntax :-    for < variable> in range ( ):

                        # body_of_loop

                else: 

                        # statement1

                                                            END

 

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